You need to have your Hilton HHonors Double Dip option set to Points & Variable miles and have Aeroflot selected as the partner airline. Note that Aeroflot doesn’t participate to the fixed miles option.

You earn double miles on your second stay, triple miles on your third stay and quadruple miles on your fourth and subsequent stays during the promotional period.

On your first eligible stay during the Promotional Period, earn 1 bonus Aeroflot Bonus Mile. On your second eligible stay during the Promotional Period, earn 2 bonus Aeroflot Bonus Miles. On your third or more eligible stays during the Promotional Period, earn 3 bonus Aeroflot Bonus Miles per 1 USD spent. Earn up to a maximum of 100 bonus Aeroflot Bonus Miles per stay at Hampton Inn, Homewood Suites and Home2 Suites.

Conclusion

Personally, I really like the bonus offers that are tried to fixed number of miles you earn. These variable miles offers are better for those that have high eligible folio amount.

Here are the terms and conditions of this offer:

To be eligible for this offer, you must (1) be a member of Hilton HHonors; (2) select Aeroflot Russian Airlines as your preferred Double Dip® Points & Miles™ Partner in your Hilton HHonors account profile, (3) select Points and Miles as your Double Dip Earning Style within your HHonors profile; (4) register online at HHonors.com/AeroflotQuadruple prior to completing your stay; and (5) complete an eligible stay at any participating hotel or resort within the Hilton HHonors portfolio from October 1, 2013 through January 31, 2014 (“Promotional Period”).

On your first eligible stay during the Promotional Period, earn 1 bonus Aeroflot Bonus Mile. On your second eligible stay during the Promotional Period, earn 2 bonus Aeroflot Bonus Miles. On your third or more eligible stays during the Promotional Period, earn 3 bonus Aeroflot Bonus Miles per 1 USD spent. Earn up to a maximum of 100 bonus Aeroflot Bonus Miles per stay at Hampton Inn, Homewood Suites and Home2 Suites.